Load Specifications
Load data in caliber .25-06 Ackley Improved with .257 | 101gr | Barnes LRX BT bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Alliant Reloder-16.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 57,450 psi | 88% | 3074 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 58,291 psi | 89% | 3143 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,667 psi | 88% | 3189 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 57,667 psi | 88% | 3130 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,535 psi | 85% | 3189 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 57,479 psi | 88% | 3163 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,521 psi | 87% | 3232 fps | 97.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 58,204 psi | 89% | 3287 fps | 97.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,566 psi | 88% | 3301 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 58,610 psi | 90% | 3192 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 58,653 psi | 90% | 3215 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,014 psi | 86% | 3248 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,798 psi | 89% | 3274 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,898 psi | 86% | 3215 fps | 97.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,435 psi | 88% | 3281 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,172 psi | 83% | 3205 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,021 psi | 72% | 3123 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 58,798 psi | 90% | 3356 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,547 psi | 81% | 3196 fps | 97.3% |
| Bofors RP3 | <<locked>> | 84% | 56,014 psi | 86% | 3153 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,435 psi | 88% | 3281 fps | 98.3% |
| Bofors RP7 | <<locked>> | 90% | 59,001 psi | 90% | 3196 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 56,173 psi | 86% | 3166 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 57,638 psi | 88% | 3241 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 56,811 psi | 87% | 3196 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 98% | 58,117 psi | 89% | 3222 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,811 psi | 87% | 3202 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,391 psi | 86% | 3163 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,537 psi | 88% | 3205 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,861 psi | 70% | 3150 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 90% | 58,494 psi | 90% | 3281 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 56% | 2031 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,972 psi | 89% | 3173 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,101 psi | 87% | 3150 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,883 psi | 86% | 3127 fps | 99% |
| IMR 4350 | <<locked>> | 92% | 56,608 psi | 87% | 3166 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,782 psi | 87% | 3163 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 55,840 psi | 86% | 3176 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,492 psi | 87% | 3189 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,840 psi | 86% | 3150 fps | 96.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,506 psi | 85% | 3255 fps | 96.7% |
| Lovex S060 | <<locked>> | 82% | 58,291 psi | 89% | 3133 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,392 psi | 88% | 3143 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 57,174 psi | 88% | 3159 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 58,813 psi | 90% | 3209 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,674 psi | 73% | 3022 fps | 98.5% |
| Norma 201 | <<locked>> | 82% | 58,595 psi | 90% | 3156 fps | 100% |
| Norma 203B | <<locked>> | 84% | 57,943 psi | 89% | 3196 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,624 psi | 88% | 3222 fps | 98% |
| Norma MRP | <<locked>> | 98% | 57,232 psi | 88% | 3310 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 57,754 psi | 88% | 3228 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,521 psi | 85% | 3166 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,101 psi | 86% | 3271 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 92% | 56,666 psi | 87% | 3228 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,488 psi | 77% | 3133 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,014 psi | 57% | 2073 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,231 psi | 86% | 3153 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 57,058 psi | 87% | 3264 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,564 psi | 85% | 3209 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,899 psi | 89% | 3297 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,325 psi | 71% | 3146 fps | 97.8% |
| Rottweil R 902 | <<locked>> | 82% | 55,753 psi | 85% | 3104 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,173 psi | 86% | 3150 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 58,131 psi | 89% | 3202 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 98% | 58,856 psi | 90% | 3261 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 90% | 59,001 psi | 90% | 3196 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 57,174 psi | 88% | 3159 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 57,392 psi | 88% | 3143 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 58,813 psi | 90% | 3209 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,696 psi | 88% | 3209 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 58,305 psi | 89% | 3179 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 58,856 psi | 90% | 3077 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,623 psi | 87% | 3028 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,971 psi | 87% | 3110 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 58,363 psi | 89% | 3255 fps | 98.4% |
| Somchem S335 | <<locked>> | 82% | 58,900 psi | 90% | 3074 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 55,883 psi | 86% | 3143 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,376 psi | 86% | 3127 fps | 96.1% |
| Somchem S365 | <<locked>> | 94% | 57,566 psi | 88% | 3232 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,796 psi | 85% | 3173 fps | 98.6% |
| Vihtavuori N135 | <<locked>> | 82% | 55,912 psi | 86% | 3058 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,304 psi | 86% | 3074 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,435 psi | 88% | 3117 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,159 psi | 86% | 3166 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,245 psi | 85% | 3143 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 84% | 58,102 psi | 89% | 3117 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,172 psi | 85% | 3166 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 56,478 psi | 87% | 3232 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,290 psi | 88% | 3294 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,927 psi | 86% | 3123 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,638 psi | 88% | 3241 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,111 psi | 77% | 3271 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 58,755 psi | 90% | 3189 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,246 psi | 86% | 3169 fps | 97.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 53,780 psi | 82% | 3025 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,111 psi | 78% | 3022 fps | 97.6% |
| Accurate 3100 | <<locked>> | 86% | 35,578 psi | 55% | 2759 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 50,937 psi | 78% | 3028 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,030 psi | 60% | 2871 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 47,703 psi | 73% | 2995 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 46,267 psi | 71% | 3038 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 50,560 psi | 77% | 3146 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,476 psi | 82% | 3232 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,327 psi | 74% | 3022 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,619 psi | 79% | 3097 fps | 99.9% |
| Alliant Reloder-16 | 47.1 gr | 80% | 37,869 psi | 58% | 2884 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,265 psi | 66% | 3022 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 45,963 psi | 70% | 3028 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,613 psi | 67% | 3018 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,876 psi | 43% | 2602 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 36,172 psi | 55% | 2861 fps | 95.9% |
| Alliant Reloder-26 | 54.5 gr | 84% | 34,592 psi | 53% | 2861 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 45,948 psi | 70% | 3064 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 49,081 psi | 75% | 3038 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 43,613 psi | 67% | 3018 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 42,772 psi | 66% | 2890 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 49,313 psi | 76% | 3048 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 41,046 psi | 63% | 2920 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 43,947 psi | 67% | 2949 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 96% | 54,288 psi | 83% | 3159 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,113 psi | 81% | 3136 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,505 psi | 54% | 2769 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,925 psi | 83% | 3150 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,946 psi | 66% | 3077 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 40,205 psi | 62% | 2927 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,253 psi | 42% | 1818 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,418 psi | 83% | 3117 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,183 psi | 77% | 3035 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,475 psi | 80% | 3064 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 41,133 psi | 63% | 2871 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,121 psi | 68% | 2923 fps | 96.6% |
| IMR 4831 | <<locked>> | 80% | 37,478 psi | 57% | 2822 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 52,982 psi | 81% | 3130 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,402 psi | 80% | 3091 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 98% | 51,851 psi | 79% | 3186 fps | 95.8% |
| Lovex S060 | <<locked>> | 80% | 54,737 psi | 84% | 3077 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,473 psi | 77% | 3031 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,843 psi | 64% | 2874 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 40,045 psi | 61% | 2848 fps | 95.7% |
| Lovex S071 | <<locked>> | 92% | 36,825 psi | 56% | 2789 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 54,969 psi | 84% | 3100 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,981 psi | 78% | 3081 fps | 100% |
| Norma 204 | <<locked>> | 86% | 46,746 psi | 72% | 3025 fps | 95.5% |
| Norma MRP | 55.5 gr | 88% | 39,987 psi | 61% | 2966 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 38,740 psi | 59% | 2864 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 51,779 psi | 79% | 3107 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 48,414 psi | 74% | 3127 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 37,652 psi | 58% | 2848 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 96% | 43,279 psi | 66% | 2989 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,717 psi | 42% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,269 psi | 75% | 3028 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,934 psi | 70% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,856 psi | 60% | 2884 fps | 97.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,739 psi | 58% | 2894 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 40,059 psi | 61% | 2992 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 52,315 psi | 80% | 3048 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,064 psi | 71% | 2976 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 50,995 psi | 78% | 3074 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 90% | 45,136 psi | 69% | 3012 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 42,772 psi | 66% | 2890 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,843 psi | 64% | 2874 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 50,473 psi | 77% | 3031 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,045 psi | 61% | 2848 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,297 psi | 72% | 3031 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,766 psi | 84% | 3127 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 55,448 psi | 85% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,007 psi | 72% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,901 psi | 63% | 2808 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 44,730 psi | 69% | 3005 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 55,376 psi | 85% | 3022 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 46,296 psi | 71% | 2979 fps | 99.9% |
| Somchem S361 | <<locked>> | 92% | 52,678 psi | 81% | 3064 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 35,317 psi | 54% | 2818 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 42,699 psi | 65% | 2927 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 52,620 psi | 81% | 3012 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,808 psi | 81% | 3022 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,193 psi | 68% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,089 psi | 61% | 2864 fps | 98% |
| Vihtavuori N165 | <<locked>> | 92% | 42,264 psi | 65% | 2904 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 51,227 psi | 78% | 3012 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,711 psi | 61% | 2867 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 30,893 psi | 47% | 2690 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 96% | 53,272 psi | 82% | 3225 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,378 psi | 60% | 2831 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 41,046 psi | 63% | 2920 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 28,253 psi | 43% | 2700 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,143 psi | 84% | 3133 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 45,237 psi | 69% | 2969 fps | 95.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 94 powders for .25-06 Ackley Improved loaded with the .257 | 101gr | Barnes LRX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,356 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,356 fps. Accurate 3100 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (450 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 101.0 gr projectile in 0.257" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Reloder-26, Norma MRP, Alliant Reloder-16 rank at the top here: for .25-06 Ackley Improved with the .257 | 101gr | Barnes LRX BT they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.